87TS01I-E ABB

After determining the control scale of the PLC machine,a certain margin should be considered to adapt to the changes in the technological process and the expansion of system functions.Generally,it can be considered as a margin of 10 to 15%.In addition,we must also consider the structure of the PLC,analyze it from the collocation of I/O points,and decide whether to choose an integral or modular PLC.

在确定了PLC机的控制规模后，还要考虑一定的余量，以适应工艺流程的变动及系统功能的扩充，一般可按10～15％的余量来考虑。另外，还要考虑PLC的结构，从Ｉ／Ｏ点数的搭配上加以分析，决定选择整体式还是模块式的PLC。